In a bowl or jar, combine the chia seeds, milk, vanilla extract, and maple syrup. Stir the mixture thoroughly to ensure that the seeds are evenly dispersed. Let the mixture rest for about 10 minutes, allowing the chia seeds to begin gelling. After this initial rest period, stir the mixture again to break up any clumps and promote even thickening.
Once mixed, cover the bowl or jar and refrigerate it for at least one hour, allowing the pudding to fully set. For a convenient make-ahead breakfast, the mixture can be left to chill overnight.
When ready to serve, give the chia pudding a final stir. Add your choice of fresh fruits, nuts, seeds, or spices to elevate the flavor and enjoy.